A prominent political historian says President Donald Trump should end his daily Twitter wars with the world.

"Trump has proven far better than seasoned journalists and ego-driven celebrities at creating go-for-the-jugular put-downs of 240 characters or less," Victor Davis Hanson, a classicist and historian at the Hoover Institution, Stanford University, writes in Thursday's National Review.

"So why should Trump still care what a minor journalist tweets about him to get much-needed attention? Why does the president need to keep pounding increasingly irrelevant former FBI Director James Comey, who has been reduced to tweeting anti-Trump slogans?"